Enantioselective Intramolecular Michael Addition of Nitronates onto Conjugated Esters: Access to Cyclic γ-Amino Acids with up to Three Stereocenters [J. Am. Chem. Soc. 2009, 131, 16016– 16017]. William J. Nodes, David R. Nutt, Ann M. Chippindale, and Alexander J. A. Cobb Page 16016. The structures of catalysts C and D in Table 1 are incorrect. Catalyst C, shown below, was synthesized from hydroquinidine, while catalyst D, shown below, was synthesized from hydroquinine. The same change applies to structure C on p S22 of the Supporting Information.
The last sentence of the third paragraph should therefore read, “Interestingly, the use of hydroquinine-derived catalyst D gives the oppositely configured product to hydroquinidine-derived catalyst C...”. Page 16017. We add two additional references, refs 3d and 5f. Supporting Information Available: Experimental procedures, characterization data, and CIF and PDB files (corrected). This material is available free of charge via the Internet at http:// pubs.acs.org.
Literature Cited (3d) Ye, J.; Dixon, D. J.; Hynes, P. S. Chem. Commun. 2005, 4481. (5f) Wiesner, M.; Revell, J. D.; Tonazzi, S.; Wennemers, H. J. Am. Chem. Soc. 2008, 130, 5610.
JA9092083 10.1021/ja9092083
10.1021/ja9092083 2010 American Chemical Society
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